HP Switch 2800 Series Management And Configuration Manual page 289

CDP Enabled on both
ends of the link between
"A" and "B".
CDP disabled on port A1
of switch "A" (but
enabled on port B5 of
switch "B".
Figure 13-18. Example of Disabling CDP on an Individual Port
Enabling or Disabling CDP Operation on Individual Ports. In the
factory-default configuration, the switch has all ports enabled and transmit­
ting CDP packets. Disabling CDP on a port prevents that port from sending
outbound CDP packets and causes it to drop inbound CDP packets without
recording their data in the CDP Neighbors table. Suppose, for example, that
switches "A" and "B" in figure 13-18 (below) are running CDP, and that port
A1 on switch "A" is connected to port B5 on switch "B". If you disable CDP on
port A1 of switch "A", then switch "B" will no longer receive CDP packets from
switch "A" and switch "A" will drop the CDP packets it receives from switch
"B".
Port A1
Switch "A"
CDP Enabled on Port A1
CDP Neighbor Table
Port | Data
------|------------------
A1 | Switch "B" data
Port A1
Switch "A"
CDP Disabled on Port A1
CDP Neighbor Table
-Empty for port A1-
(The switch "A" entry in the switch "B" CDP Neighbors table remains until the
(time-to-live; set in switch "B") expires. Until then, the
cdp holdtime
command continues to list switch "A" on port B5 of switch "B".)
neighbors
Syntax: [no] cdp enable < [e] port-list >
For example, to disable CDP on port A1:
HPswitch(config) no cdp enable a1
Configuring for Network Management Applications
Switch "B"
CDP Enabled on Port B5
CDP Neighbor Table
Port | Data
Port B5
------|------------------
B5 | Switch "A" data
Switch "B"
CDP Enabled on Port B5
CDP Neighbor Table
- Empty for Port B5 -
Port B5
CDP
show cdp
13-35